This is where he has no choice under the present system: he pays in part for your kid in taxes, and he pays in full for his kid in tuition. You pay for your kid (in the same part as him) in taxes. Everything else is the same: you both paid top dollar for the house and you both will get top dollar when you sell. You mobility is greater than his, because there are more public schools around than private schools. Most areas of the United States are not within a reasonable reach of a private school. So your sacrifice of moving to a good school district does not compare to his sacrifice of paying twice when you pay once and being tied to one private school that suits his need.